High Quality Content by WIKIPEDIA articles! A directory information tree (DIT) is data represented in a hierarchical tree-like structure consisting of the Distinguished Names (DNs) of directory service entries. Both the X.500 protocols and the Lightweight Directory Access Protocol (LDAP) use directory information trees as their fundamental data structure. The top levels of a directory information tree frequently represent political and geographic divisions. The original assumption of X.500 was that all directory servers would be interconnected to form a single, global namespace. The entries at the top level of the tree corresponded to countries, identified by their ISO 3166 two letter country code. The entries subordinate to a country's entry would correspond to states or provinces, and national organizations. The naming system for a particular country was determined by that country's national standards body or telecommunications provider.

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